Was the HVAC Blower Controls System Check performed?

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Go to Step 2

Go to HVAC Blower Controls System Check

1. Place heater and A/C controller mode switch in the heat position.
2. Place heater and A/C controller blower motor switch in the HI position.
3. Disconnect the blower motor resistor/relay connector.
4. Place the ignition switch in the RUN position.
5. Connect an unpowered test lamp between the blower motor resistor/relay connector, cavity B for CKT 52 (ORN), and ground.

Does the test lamp light?

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Go to Step 3

Go to Step 4

Connect an unpowered test lamp to the blower motor resistor/relay connector, cavity A for CKT 542 (RED), and ground.

Does the test lamp light?

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Go to Step 5

Go to Step 6

1. Disconnect the heater and A/C controller C2 connector.
2. Connect a J 39200 between the heater and A/C controller, pin D, and pin G.

Is continuity present?

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Go to Step 7

Go to Step 8

Replace the blower motor resistor/relay.

Refer to Blower Motor Resistor Replacement .

Is the repair complete?

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Go to HVAC Blower Controls System Check

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Repair the open in CKT 542 (RED) between the underhood fuse-relay center and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

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Go to HVAC Blower Controls System Check

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Repair the open in CKT 52 (ORN) between the heater and A/C controller and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

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Go to HVAC Blower Controls System Check

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Replace the heater and A/C controller.

Refer to Control Assembly Replacement .

Is the repair complete?

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Go to HVAC Blower Controls System Check

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